JPH11341722A - Armature and armature winding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a size of a DC motor while keeping an high output, by forming a winding for electromotive force wound to each teeth with a plurality of windings for electromotive force, and then coupling in parallel the winding for electromotive force between the corresponding segments. SOLUTION: A winding for electromotive force 24 is coupled to the eighth segment 8 and the winding for electromotive force 24 is inserted to the first and second slots 20a, 20b. The winding for electromotive force 24 is wound for N times to the second teeth 21b between both slots 20a, 20b. Thereafter, the winding for electromotive force 24 is hooked to the third segment 3 corresponding to the segment pitch by almost making a turn along the rotating shaft 14 so that it is engaged with the rotating shaft 14 in order to complete the second winding of the second teeth 21b. In this case, the first and second windings for electromotive force 24 wound for N times to the second teeth 21b are coupled at the winding ends thereof with the eighth and third segments 8, 3. Therefore, the first and second windings for electromotive force 24 of the same number of turns are connected in parallel between the eighth and third segments.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an armature and a method of winding an armature.

[0002]

2. Description of the Related Art The output of a DC motor is proportional to the magnitude of a current flowing through an electromotive force winding of an armature. The larger the cross-sectional area of the electromotive force winding, that is, the larger the thickness of the electromotive force winding, the smaller the loss, and a larger current can flow through the electromotive force winding. Therefore, in a DC motor, in order to obtain a high output, it is advantageous that the electromotive force winding is thicker if the number of turns is the same.

[0003]

When winding the armature teeth using a thick electromotive force winding, as shown in FIG. 10, the bending radius R of the electromotive force winding 44 is large. Thus, the electromotive force winding 44 floats outward from both the upper and lower ends of the teeth 41. That is, the protrusion length H of the coil end of the armature becomes longer. For this reason, the coil end of the armature wound by the thick electromotive force winding 44 greatly expands, and there is a problem in further downsizing the DC motor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an armature and a method of winding an armature that can reduce the size of a DC motor while maintaining high output. Is to do.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 provides an armature in which the electromotive force winding is wound in a concentrated winding, and the armature is wound around each tooth. The obtained electromotive force windings are wound by n (n is an integer of 2 or more) electromotive force windings, and each of the electromotive force windings is connected in parallel between corresponding segments. The gist is that

According to a second aspect of the present invention, in the armature according to the first aspect, the n electromotive force windings have the same sectional area. According to a third aspect of the present invention, in the armature according to the second aspect, each of the n electromotive force windings has the same number of turns as a tooth.

[0007] The invention described in claim 4 is the invention according to claims 1 to 3.
In the armature according to any one of the above, the gist of the armature is that the number of slots is five and the number of segments of the commutator is ten.

[0008] The invention described in claim 5 is the invention according to claims 1 to 3.
In the armature described in any one of the above, the gist of the armature is that the number of slots is seven and the number of segments of the commutator is 21.

[0009] The invention according to claim 6 is the invention according to claims 1 to 5.
In the armature winding method for winding an electromotive force winding around an armature according to any one of the above, the electromotive force winding wound around each tooth may include two electromotive force windings And the two electromotive force windings are separately wound into a first electromotive force winding and a second electromotive force winding by two different winding mechanisms. The gist of the two different winding mechanisms is to simultaneously wind the electromotive force winding on the two teeth.

(Operation) According to the first aspect of the present invention,
When comparing the case where n electromotive force windings in parallel with each other are wound around a tooth and the case where one electromotive force winding is wound around a tooth, the number of turns is the same. , And the sum of the cross-sectional areas of the n electromotive force windings is the cross-sectional area of one electromotive force winding. When the n windings for electromotive force are wound around the teeth, the cross-sectional area (thickness) of each winding for electromotive force becomes small, so that the bending radius when winding the winding around the teeth becomes small. As a result, it is possible to shorten the protrusion of the coil end while maintaining the same output as in the case where one thick electromotive force winding is used, and to reduce the size of the motor.

According to the second aspect of the present invention, the case where n teeth for the electromotive force in parallel with each other are wound around the tooth and the case where the winding is wound around the tooth with one winding for the electromotive force are used. When the number of turns is the same when comparing
The cross-sectional area of each of the n electromotive force windings is 1 / n of the cross-sectional area of the single electromotive force winding. When n electromotive force windings are wound around the teeth, since the cross-sectional area (thickness) of each electromotive force winding is reduced to 1 / n, the bending radius at the time of winding around the teeth is Become smaller. As a result, it is possible to shorten the protrusion of the coil end while maintaining the same output as in the case where one thick electromotive force winding is used, and to reduce the size of the motor.

According to the third aspect of the present invention, the case where n teeth for the electromotive force in parallel with each other are wound around the tooth and the case where the winding is wound around the tooth with one winding for the electromotive force are used. When compared with the case, since the number of turns is the same, the cross-sectional area of each of the n electromotive force windings is 1 / n of the cross-sectional area of the single electromotive force winding. When the n windings for electromotive force are wound around the teeth, the cross-sectional area (thickness) of each winding for electromotive force becomes small, so that the bending radius when winding the winding around the teeth becomes small. Moreover, the armature in which n windings for electromotive force are wound around one tooth is an electromotive force winding having substantially the same thickness as the armature wound around one tooth and having the same number of turns. Therefore, the same output can be held. As a result, it is possible to shorten the protrusion of the coil end while maintaining the same output as in the case where one thick electromotive force winding is used, and to reduce the size of the motor.

According to the fourth aspect of the invention, in the armature having five slots and ten commutator segments, the n electromotive force windings in parallel with each other are used as teeth. When the number of turns is equal to each other when the number of turns is equal to the case where the teeth are wound with one electromotive force winding, the cross-sectional area of each of the n electromotive force windings is one. And 1 / n of the cross-sectional area of the electromotive force winding. When n windings for electromotive force are wound around teeth,
Since the cross-sectional area (thickness) of each electromotive force winding is reduced, the bending radius when wound around the teeth is reduced. As a result, it is possible to shorten the protrusion of the coil end while maintaining the same output as in the case where one thick electromotive force winding is used, and to reduce the size of the motor.

According to the invention described in claim 5, in the armature having seven slots and twenty-one commutator segments, the n electromotive force windings in parallel with each other are used as teeth. When the number of turns is equal to each other when the number of turns is equal to the case where the teeth are wound with one electromotive force winding, the cross-sectional area of each of the n electromotive force windings is one. And 1 / n of the cross-sectional area of the electromotive force winding. When n windings for electromotive force are wound around teeth,
Since the cross-sectional area (thickness) of each electromotive force winding is reduced, the bending radius when wound around the teeth is reduced. As a result, it is possible to shorten the protrusion of the coil end while maintaining the same output as in the case where one thick electromotive force winding is used, and to reduce the size of the motor.

According to the sixth aspect of the present invention, the two electromotive force windings are first driven by two different winding mechanisms.
The winding is divided into a second electromotive winding and a second electromotive winding, and the two different winding mechanisms simultaneously wind the two electromotive windings on two teeth. Therefore, the cycle time of winding can be reduced as compared with the case where one electromotive force winding is wound on one tooth by one winding mechanism.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an armature 13 is accommodated in a motor housing 12 constituting a DC motor 11 as a DC machine, and a rotating shaft 14 of the armature 13 is rotatably supported by bearings 15 and 16. ing. On the inner wall of the motor housing 12, m field fields 17 are arranged so as to surround the armature 13. In the present embodiment, four field magnets 17 are arranged.

The outer periphery of the armature 13 is provided with s (= m + 1) slots 20 parallel to the axis of the rotating shaft 14. The slot 20 is formed in a wedge-shaped groove as shown in FIG. In this embodiment, 5 (= 4 + 1) slots 20 are formed. In addition, each slot 2
A tooth 21 having a protrusion extending toward the slot 20 is formed between the zeros. The protruding portions of the teeth 21 are formed so as to cover both adjacent slots 20, and the teeth 21 are formed in a T-shaped cross section extending in a radial direction.

One end of the armature 13 has a commutator 22
Is provided. The commutator 22 is (mxs / 2)
In this embodiment, 10 (= 4 × 5/2) segments 23 are provided. Then, an electromotive force winding 2 having a half cross-sectional area of the conventional electromotive force winding is provided on the teeth 21 between the slots 20.
4 is wound around the two winding mechanisms 31a and 31b, so that the electromotive force winding 24 is wound around the armature 13.

Next, a winding method when the electromotive force winding 24 is wound around the armature 13 by concentrated winding will be described with reference to FIGS. As shown in FIG. 2, the first winding mechanism 31
a forma 32a (hereinafter referred to as a first forma 32a)
The former 32b of the second winding mechanism 31b (hereinafter referred to as a second former 32b) is formed to have a length corresponding to the slot pitch so that the electromotive force winding 24 can be guided into the slot 20 at a predetermined slot pitch. I have. In the present embodiment, the first former 32a and the second former 32b are formed to have the length of one tooth 21. Also, the first
The former 32a and the second former 32b are
1 are arranged at an interval between them by one. Then, the electromotive force winding 24 is wound around the first and second formers 32a, 32b by flyers (not shown) of the two winding mechanisms 31a, 31b, respectively.
The electromotive force winding 24 is wound between the two slots 20.
The electromotive force windings 24 fed from the two winding mechanisms 31a and 31b are made of the same material and have the same cross-sectional area (thickness).

In FIG. 2 to FIG. 6, in order to clearly explain the winding method, reference numerals “a” to “e” are added to the number “20” to distinguish each of the five slots 20. The first to fifth slots 20a to 20e are used to distinguish the ten segments 23 from each other.
0 segment 1 to 10 Also, 5 teeth 2
In order to distinguish 1 from each other, “a” to
The first to fifth teeth 21a to 21 are denoted by symbols "e".
e.

Further, a mark with "x" in the circle indicates that the electromotive force winding 24 advances from the front to the back of the drawing, and a mark with "•" in the circle indicates the electromotive force. This indicates that the use winding 24 advances from the back of the paper to the front.

First, before the winding of the electromotive force winding 24 shown in FIG. 2, the first and second formers 32a and 32b (not shown)
(See FIG. 8). In the first former 32a, the connection winding 25 is connected to the ninth segment 9, and the connection winding 25 is passed through the first slot 20a. Next, the connection winding 25 is passed through the second slot 20b corresponding to the slot pitch, and the second teeth 21b between the slots 20a and 20b are passed.
After the connection winding 25 is wound once, the ninth segment 9
Is hooked on the eighth segment 8 of the corresponding in-phase segment.

On the other hand, at the same time, in the second former 32b, although not shown, the connection winding 25
And the connection winding 25 is passed through the third slot 20c. Next, the fourth slot 20d corresponding to the slot pitch
After the connection winding 25 is passed through the fourth teeth 21d between the slots 20c and 20d once, the connection winding 25 is passed through the second segment 2 of the in-phase segment corresponding to the third segment 3. Hook.

Next, as shown in FIG. 2, the connection winding 25 hooked on the eighth segment 8 is connected to the electromotive force winding 24.
Then, the electromotive force winding 24 is passed through the first slot 20a. Next, the second slot 20b corresponding to the slot pitch
Through the electromotive force winding 24 and both slots 20a, 20b
The electromotive force winding 24 is wound N times between the second teeth 21b. Thereafter, the electromotive force winding 24 is connected to the rotating shaft 14.
After making a complete turn around the rotary shaft 14 so as to be entangled with the third segment 3, the third segment 3 corresponding to the segment pitch is hooked.

On the other hand, as shown in FIG. 2, the connection winding 25 hooked on the second
Then, the electromotive force winding 24 is passed through the third slot 20c. Next, the fourth slot 20d corresponding to the slot pitch
Through the electromotive force winding 24 and both slots 20c, 20d
The electromotive force winding 24 is wound N times with respect to the fourth tooth 21d therebetween. Thereafter, the electromotive force winding 24 is connected to the rotating shaft 14.
After turning substantially one round along the rotation axis 14 so as to be entangled with the seventh segment 7, it is hooked on the seventh segment 7 corresponding to the segment pitch.

The second teeth 21b and the fourth teeth 21
When the first winding of d is completed, the rotating shaft 14 is rotated in the counterclockwise direction indicated by the arrow in FIG. 2 so that the fifth slot 20e comes to the position of the first slot 20a in FIG.
(In this embodiment, rotate 36 (= 360/10) degrees in the counterclockwise direction) so that the first former 32a and the second former 32b are simultaneously positioned between the next slot 20 respectively. Is wound around the connection winding 25 and the electromotive force winding 24.

First, before the winding of the electromotive force winding 24 shown in FIG. 3, the first former 32a connects the electromotive force winding 24 hooked on the seventh segment 7 to the connection winding (not shown). A line 25 is passed through the fifth slot 20e. Then the first
Pass the connection winding 25 through the slot 20a,
The connection winding 25 is connected to the first teeth 21a between the first teeth 0e and 20a.
Is wound once, and then hooked onto the sixth segment 6 of the in-phase segment corresponding to the seventh segment 7.

On the other hand, at the same time, in the second former 32b, although not shown, a connection winding 25 is newly connected to the first segment 1, and the connection winding 25 is connected to the second slot 20b.
Pass through. Next, the connection winding 25 is passed through the third slot 20c corresponding to the slot pitch, and both slots 20b, 2b
After the connection winding 25 is wound once around the third tooth 21c between 0c, it is hooked on the tenth segment 10 of the in-phase segment corresponding to the first segment 1.

Next, as shown in FIG. 3, the connection winding 25 hooked on the sixth segment 6 is connected to the electromotive force winding 24.
Through the fifth slot 20e. Next, the electromotive force winding 24 is passed through the first slot 20a, and both slots 20e,
The electromotive force winding 24 is wound N times around the first teeth 21a between 20a. Thereafter, the electromotive force winding 24 is wound around the rotary shaft 14 substantially one turn so as to be entangled with the rotary shaft 14 and then hooked on the first segment 1 corresponding to the segment pitch.

On the other hand, in the second former 32b, as shown in FIG. 3, the connection winding 25 hooked on the tenth segment
The electromotive force winding 24 is passed through 0b. Next, the electromotive force winding 24 is passed through the third slot 20c corresponding to the slot pitch, and the third teeth 21c between the slots 20b and 20c are formed.
, The electromotive force winding 24 is wound N times. After this,
The electromotive force winding 24 is wound around the rotary shaft 14 substantially one round so as to be entangled with the rotary shaft 14 and then hooked on the fifth segment 5 corresponding to the segment pitch. When the first winding of the first tooth 21a and the third tooth 21c is completed, the counterclockwise direction indicated by an arrow in FIG. 3 is set so that the fourth slot 20d is located at the position of the fifth slot 20e in FIG. Next, the armature 13 is rotated about the rotation shaft 14 (in the present embodiment, 36 (= 3
The first former 32a and the second former 32b simultaneously wind the connection winding 25 and the electromotive force winding 24 between the next slots 20, respectively.

First, before winding the electromotive force winding 24 shown in FIG. 4, in the first former 32a, although not shown, the electromotive force winding 24 hooked on the fifth segment 5 is connected. A line 25 is passed through the fourth slot 20d. Then the fifth
Pass the connection winding 25 through the slot 20e,
The connection winding 25 is connected to the fifth tooth 21e between
Is wound once, and then hooked on the fourth segment 4 of the in-phase segment corresponding to the fifth segment 5.

Next, as shown in FIG. 4, the connection winding 25 hooked on the fourth segment 4 is connected to the electromotive force winding 24.
Through the fourth slot 20d. Next, the electromotive force winding 24 is passed through the fifth slot 20e, and both slots 20d,
The winding 24 for electromotive force is wound N times for the fifth tooth 21e between 20e. Thereafter, the electromotive force winding 24 is wound around the rotary shaft 14 substantially one turn so as to be entangled with the rotary shaft 14 and then hooked on the ninth segment 9 corresponding to the segment pitch.

On the other hand, at the same time, the second former 32b has already connected the first connection winding 25 and the electromotive force winding 2 to each other.
Only the electromotive force winding 24 is wound around the second teeth 21b on which the winding 4 has been wound. That is, as shown in FIG. 4, the electromotive force winding 24 is connected to the eighth segment 8 and
a through the electromotive force winding 24. Next, the electromotive force winding 24 is passed through the second slot 20b corresponding to the slot pitch,
Regarding the second teeth 21b between the slots 20a and 20b, the electromotive force winding 24 is wound N times. Thereafter, the rotating shaft 14 is wound so that the electromotive force winding 24 is entangled with the rotating shaft 14.
After making a full turn around along the third segment 3 corresponding to the segment pitch, the second winding of the second teeth 21b is completed. At this time, the first teeth N wound around the second teeth 21b each time N times
The winding ends of the first and second electromotive force windings 24 are respectively connected to the eighth segment 8 and the third segment 3. Therefore, the first and second electromotive force windings 24 having the same number of turns are the eighth segment 8 and the third
It is connected in parallel with the segment 3.

Similarly, when the first winding of the fifth tooth 21e and the second winding of the second tooth 21b are completed, the third slot 20c is located at the position of the fourth slot 20d in FIG. Next, the armature 13 is rotated about the rotation shaft 14 in the counterclockwise direction indicated by the arrow in FIG. 4 (in the present embodiment, 36 (= 360 /
The first former 32a and the second former 32b simultaneously wind the electromotive force winding 24 between the next slots 20, respectively.

As shown in FIG. 5, in the first former 32a, the first connection winding 25 and the electromotive force winding 2 have already been formed.
Only the electromotive force winding 24 is wound around the fourth tooth 21d on which the wire 4 is wound. That is, the electromotive force winding 24 is connected to the second segment 2 and passed through the third slot 20c. Then the fourth
The electromotive force winding 24 is passed through the slot 20d, and the electromotive force winding 24 is wound N times around the fourth tooth 21d between the slots 20c and 20d. Thereafter, the electromotive force winding 2
The fourth tooth 21 is wound around the rotary shaft 14 substantially one turn so as to be entangled with the rotary shaft 14 and then hooked onto the seventh segment 7 corresponding to the segment pitch.
The second winding at d ends. At this time, the fourth
The winding ends of the first and second electromotive force windings 24 wound N times around the teeth 21d are connected to the second segment 7 and the seventh segment 7, respectively.
Therefore, the first and second electromotive force windings 24 having the same number of turns are connected in parallel between the second segment 2 and the seventh segment 7.

On the other hand, at the same time, in the second former 32b, the first connection winding 25 and the electromotive force winding 2 have already been formed.
Only the electromotive force winding 24 is wound around the first teeth 21a on which the wire 4 is wound. That is, as shown in FIG. 5, the electromotive force winding 24 is connected to the sixth segment 6, and the fifth slot 20
e through the electromotive force winding 24. Next, the electromotive force winding 24 is passed through the first slot 20a corresponding to the slot pitch,
The electromotive force winding 24 is wound N times with respect to the first teeth 21a between the slots 20e and 20a. Thereafter, the rotating shaft 14 is wound so that the electromotive force winding 24 is entangled with the rotating shaft 14.
And then hooked onto the first segment 1 corresponding to the segment pitch, whereby the second winding on the first teeth 21a is completed. At this time, the first teeth 21a wound N times each
The winding ends of the first and second electromotive force windings 24 are connected to the sixth segment 6 and the first segment 1, respectively. Therefore, the first and second electromotive force windings 24 having the same number of turns are the sixth segment 6 and the first
It is connected in parallel with the segment 1.

The fourth tooth 21d and the first tooth 21a
When the second winding is completed, the rotating shaft 14 is rotated in the counterclockwise direction indicated by the arrow in FIG. 5 so that the second slot 20b comes to the position of the third slot 20c in FIG.
(In this embodiment, rotate 36 (= 360/10) degrees in the counterclockwise direction) so that the first former 32a and the second former 32b are simultaneously positioned between the next slot 20 respectively. Is wound around the electromotive force winding 24.

As shown in FIG. 6, in the first former 32a, the first connection winding 25 and the electromotive force winding 2 have already been formed.
Only the electromotive force winding 24 is wound around the third teeth 21c on which the wire 4 is wound. That is, the electromotive force winding 24 is connected to the tenth segment 10 and passes through the second slot 20b. Next, the electromotive force winding 24 is passed through the third slot 20c, and the third teeth 21c between the slots 20b and 20c are
The electromotive force winding 24 is wound N times. Thereafter, the electromotive force winding 24 is wound around the rotation shaft 14 substantially one turn so as to be entangled with the rotation shaft 14 and then hooked on the fifth segment 5 corresponding to the segment pitch, thereby forming the second teeth 21c of the third teeth 21c. The second winding ends. At this time,
The first and second electromotive force windings 24 each wound N times around the third teeth 21c have their winding ends connected to the tenth segment 10 and the fifth segment 5, respectively. Therefore, the first and second electromotive force windings 24 having the same number of turns are connected in parallel between the tenth segment 10 and the fifth segment 5.

On the other hand, at the same time, the second former 32b has already connected the first connection winding 25 and the electromotive force winding 2 to each other.
Only the electromotive force winding 24 is wound around the fifth tooth 21e on which the wire 4 is wound. That is, as shown in FIG. 6, the electromotive force winding 24 is connected to the fourth
The electromotive force winding 24 is passed through d. Next, the electromotive force winding 24 is passed through the fifth slot 20e corresponding to the slot pitch,
With respect to the fifth tooth 21e between the slots 20d and 20e, the electromotive force winding 24 is wound N times. Thereafter, the rotating shaft 14 is wound so that the electromotive force winding 24 is entangled with the rotating shaft 14.
After making a full turn around along the ninth segment 9 corresponding to the segment pitch, the second winding of the fifth tooth 21e is completed. At this time, the first teeth N wound around the fifth teeth 21e each time N times
The winding ends of the first and second electromotive force windings 24 are respectively connected to the fourth segment 4 and the ninth segment 9. Therefore, the first and second electromotive force windings 24 having the same number of turns are the fourth segment 4 and the ninth
It is connected in parallel with the segment 9.

The third tooth 21c and the fifth tooth 21e
Is completed, the armature 13
Winding to is completed. FIG. 8 shows a connection relationship by the above-mentioned winding method.

Next, the features of the above embodiment will be described below. (1) In the present embodiment, 2 teeth wound around each tooth 21
The electromotive force windings 24 having the same cross-sectional area are connected between the corresponding segments 23 so as to be connected to each other in parallel. That is, the electromotive force windings 24 wound around the teeth 21 are the first and second electromotive force windings 2.
This is substantially the same as winding the electromotive force winding having a cross-sectional area twice as large as the cross-sectional area (thickness) of No. 4 N times. As a result, in the DC motor of the present embodiment, if the current flowing through the electromotive force winding is the same, the same output as that obtained by winding the electromotive force winding having twice the cross-sectional area (thickness) N times is obtained. Becomes In other words, the same output can be obtained with the thin electromotive force winding 24. Therefore, as shown in FIG.
Can be reduced when wound around the teeth 21, and the projecting length h of the coil end can be reduced. As a result, it is possible to reduce the size of the DC motor while maintaining high output.

(2) In this embodiment, two winding mechanisms 3
1a and 31b (ie, the first and second formers 32a and 3b)
2b), the connection winding 25 and the electromotive force winding 24 were simultaneously wound around two teeth 21 having different phases.
Further, in each tooth 21, the first and second formers 32
a and 32b share the first electromotive force winding 24 and the second electromotive force winding 24, respectively.
It was wound around.

Accordingly, the cycle time of winding on the armature can be reduced as compared with the case of winding by a single winding mechanism. The above embodiment may be modified as follows.

In the above embodiment, the present invention is applied to an armature in which a five-slot, four-segment DC motor is wound around a rotation axis and a 10-segment DC motor is wound in a concentrated winding. The present invention may be applied to an armature wound with another DC motor having a concentrated winding. For example, as shown in FIG. 9, a seven-slot, 21-segment DC motor having six field magnets may be implemented on an armature wound by concentrated winding. In this case, the same effect as in the above embodiment can be obtained.

In the above embodiment, the first former 32a
The second former 32b and the second former 32b are arranged at an interval where one tooth 21 is interposed therebetween. However, the first former 32b and the second former 32b are not limited to the first former 32b unless the two winding mechanisms 31a and 31b simultaneously wind. Former 32a and second former 3
2b may be arranged at an interval corresponding to a position corresponding to the adjacent teeth 21 or a position sandwiching two or more teeth 21. In this case, the same effect as the above embodiment can be obtained.

In the above-described embodiment, the electromotive force winding 24 is wound twice on each tooth 21, but may be wound three times. In this case, the same output can be obtained with a thinner electromotive force winding, and further downsizing can be achieved. Furthermore, if the number of winding mechanisms corresponding to the number of times can be provided, the cycle time of winding can be reduced.

In the above embodiment, the present invention is embodied in an armature of a DC motor as a DC machine, but may be embodied in an armature of a permanent magnet motor in general. In this case, the same effect as in the above embodiment can be obtained.

[0048]

As described in detail above, according to the first to fifth aspects of the present invention, it is possible to reduce the size of the DC motor while maintaining high output.

According to the present invention, the cycle time of winding to the armature can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a DC motor.

FIG. 2 is an explanatory view of a winding method showing winding of an electromotive force winding around an armature.

FIG. 3 is an explanatory view of a winding method showing the winding of an electromotive force winding around an armature.

FIG. 4 is a winding method explanatory diagram showing winding of an electromotive force winding around an armature.

FIG. 5 is an explanatory diagram of a winding method showing winding of an electromotive force winding around an armature.

FIG. 6 is an explanatory diagram of a winding method showing the electromotive force winding of the armature.

FIG. 7 is a cross-sectional view of a main part of a tooth in which an electromotive force winding on an armature is wound.

FIG. 8 is a winding connection diagram equivalent to winding an electromotive force winding and a connection winding on an armature.

FIG. 9 is a winding connection diagram equivalent to the winding of an electromotive force winding and a connection winding around a 7-slot, 21-segment armature having six field fields.

FIG. 10 is a sectional view of a main part of a tooth in which an electromotive force winding on an armature according to the related art is wound.

[Explanation of symbols]

11: DC motor, 12: Motor housing, 13: Armature, 14: Rotating shaft, 17: Field, 20, 20a-20
e: slots, 21, 21a-21e: teeth, 23
... segment, 24 ... electromotive force winding, 31a, 31b ...
Winding mechanism, 32a: first former, 32b: second former.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Akira Fukushima 1-1-1, Showa-cho, Kariya-shi, Aichi Pref.

Claims (6)

[Claims] 1. An armature in which an electromotive force winding (24) is wound in a concentrated winding, the electromotive force winding (24) wound on each tooth (21) is n (n Is an integer of 2 or more), and each of the electromotive force windings (2)
4) An armature characterized by being connected in parallel with each other between corresponding segments (23). 2. The armature according to claim 1, wherein each of the n electromotive force windings has the same sectional area. 3. The armature according to claim 2, wherein the n electromotive force windings (24) have the same number of turns as the teeth (21). 4. The armature according to claim 1, wherein the armature (13) has 5 slots (20) and 10 segments (23) of the commutator (22). An armature comprising: 5. The armature according to claim 1, wherein the armature (13) has seven slots (20) and has 21 segments (23) of the commutator (22). An armature comprising: 6. An armature winding method for winding an electromotive force winding (24) around an armature according to any one of claims 1 to 5, wherein each of the teeth (21) is wound. The electromotive force winding (24) is wound around two electromotive force windings (24),
The two electromotive force windings (24) and the second electromotive force winding (24) are formed by two different winding mechanisms (31a, 31b). 24), and the two different winding mechanisms (3
1a, 31b) is a method of winding an armature, wherein two teeth (21) are simultaneously wound with an electromotive force winding (24).